Sewing machine



Jan. 29, 1946. G. sAUER ET AL SEWING MACHINE eshets-sheet 1 Filed Jan. 8, 1940 WITNSSES.-l

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Jan. 29, 1946.

G. SAUER ET AL SEWING MACHINE Filed Jan. 8, 1946 6 Sheets-Sheet 2 lL/Z' f Jan. 29, 1946. v G. sAUER ETAL Y 2,393,815

' SEWING MACHINE 'Filed Jan.. a, 1940 sheets-sheet s WITESSES.-

Jan. 29, 1946.y G. sAUER ETAL SEWING MACHINE 'Filed Jan. s, 1940 l e sheets-sheet 4 Jan. 29, V1946. G. sAuER E-rAL SEWING MACHINE SShets-Sheet 5 Filed Jan. 8, 1940l 6 Sheets-Sheet 6 S RN; /v n l Il |l\ www @uw m :l Y

Jan. 29, 1946, G. sAuR ETAL SEWING MACHINE Filed Jan. 8 1940 y BY SaLaance Patented Jan. 29, 1946 UNITED STATES PATENT OFFICE George Sauer, Berwyn, andA Albert M. Schweda andClarence C. Smith, Chicago, Ill., assignors to Union Special Machine Company, Chicago, Ill., a corporation of Illinois Application-January 8, 1940, Serial No. 312,898 1cy claims. (cl. liz-256) This invention relates to sewing machines. More particularly, it has reference to sewing machines of the iiat bed type, and in certain of its phases is concerned with improvements useful in connection with both chain stitch andA lock stitch machines.

The chief aim of our invention is to'provide for automatic circulating lubrication, not only of the mechanisms of a sewing machine by which. the complemental or lower stitch forming element and the feed element are operated, but 'also of the mechanism which imparts movement to the needle or needles and at the same time provide against the escape of lubricant to the outer surfaces of the machine frame and the parts which directly engage the work being sewed.

A further aim of our invention is to provide for controlled distribution of the oil from the supply source to the several mechanisms oi the sewing machine without necessitating the aid of any special oil displacing means requiring additional power for its operation, and also to provide for 'the 'return to the base of the machine of the excess oil released from the several mechanisms likewise by means capable of functioning without requiring power for its actuation.

' In connection with a lock stitch sewing machine having the above attributes, it is a further object of our invention to provide for the lubrication'of the rotary hooks with oil taken from the same source of supply as is used for the other moving parts of the machine.

Other objects and attendant advantages of our drawings, our improved sewing machine comf invention will appear from the following detailed w description of the attached drawings, wherein Fig. I is a view in vertical longitudinal section of a sewing machine conveniently embodying the present improvements. f

Fig. II is a horizontal section taken at a level below the top of the work-supporting base of the machine. y

Figs. III and I V are cross Asections of the machine taken as indicated respectively by the vtaken as indicated by the angled arrows VII-VII in Figs. II and VI.

Fig. VIII is a detail view in `perspective of a tube by which oil is conducted` to the needle operating mechanism of the machine.

Figs. IX, X and XI are views corresponding to Figs. I, II and III showinga modified form of our invention;

Fig. XII is a fragmentary view in section taken as indicated by the angled arrows XII, XII in Figs. I, II, IX and X. l

Fig. XIII is a view, partly in end elevation and partly in transverse section, taken as approximately indicated by the angled arrows XIII-XIII in Figs. IX and X; and

Figs. XIV and XV are detail views which will be more specifically referred to hereinafter.

In the form illustrated in Figs. I-VIII of these prises a base I with front and 'rear side walls 2 and 3, end walls 4 and 5, and a top wall 6, which latter is adapted to serve as the work support. The hollow of the base I is closed at the bottom for the 'formation of an oil tight chamber 1, by a removable plate 8 between which and the lower edges of the side and end walls 2 5, a sealing gasket 9 is interposed. Rising from the base I at one end is a hollow standard I0 with an integrally formed hollow arm II which overreaches the work support 6. As shown, the arm I I terminates in a hollow head I2 which is closed at the front by a removable cover I3. The hollow of theiarm II is subdivided by partitions I4 and I5 whereof the former separates the hollow of the head I2 from the hollow of said arm. 'I'he partition I5 is in effect 'an upward continuation of the inner face wall of the standard Ill, and, with the partition I4, defines an isolated central chamber I6 within the arm. Journaled in bearing bushings I1 and I8 respectively in the partitions I4 and I5, and also in a bearing bushing I9 set into the rear wall of the standard I 0,is a rotary shaft 20 which protrudes through the end bearing I9, and which at the exterior is provided with a combinedhan'd tively at the top and bottom of the head I2. ,Co-

operating with the needle 21 beneath the work support ofthe machine is a loop taker in the form Through the medium of a pair ofv dntermeshing spur gears 31 and 38, the hooksl'mft` 3| is driven from a rotary shaft 40.which,is jour naled in bearings 4| and respectively Yset i'nto the end wall 4 of the base land into an ,integrallyX15 formed web 43 extending inward of the chamber 1 from the rear Wall 3 of the base and in a bearing 44 in the lug 33, as best shownin Fig. II. lThe lower shaft 40 is driven in unison with the upper orvpower'shaft 28 through a train of spur gears 45, 46 and v41 withinthe hollow ofthe standard l0. It is to be'ncted however, that the ratio of the gears 31 and 38'issuch that-the-rotaryhcok 39 is caused to make two-complete rotationsfor` each vrecip'rocation of the needle bar26fasis morev or less usual inilock ystitch sewing machines.

fThemec'han-ism herein illustrated for feeding the-work duringfthe stitching is .of are'versible type generally similar in construction and operation'to that disclosed in 1S; Patent No. 2,035,503 granted to GeorgeSauer,4 one of the present-applicants, and Clarence C. Smith, 'on Marchl, 1936. As shownfthis feeding mechanis'mincludesaan eccentric' 50 on the lower shaft 4|), which, through 'atelesco'pic link 5|,isconnected 'tov an'upward arm Va'2f'of a rocker53 lon a vrock shaft 54. As seen inFig. 1I, vthis rock shaft 54 is jouralled in' bushings 55'and irespectively set .intov the -forwardly olf-set portions 51""and` 53 respectively of'theendland rear side walls 4 and 3 of the base l. VPivotally connected to the top of vthe rocker53 byY a pin lill-is a'car rier bartl for a feed dog-62 (Fig. V); 'Thus the feed'dog 62 vreceives lits horizontal or work advancing-,movements as a consequence of the affare-described connections'with the .eccentric V51| onthe shaft 48. Lift movements are imparted to the feed dog-62rby ar-crank 63 atthe outer '.(leit hand). end of the shaft 40, throughfa pendant strap 1in'k`165 whichV is connected at itslcwer end to adownward1y and forwardlyeurvedarm (it on the feed dog carrier'l, see Fig. V. .Eorvthe purpose of controlling the stroke of the feed 'dog 62, there is providedaregulating.rnecl'ianisn'rincluding a shaft 61 whichisfsuitably journaled in i Ythe bearing luge-33 andthe Web 43 within the chamber V1. At its left hand` end in Fgy'IL the regulating vshaft 561 fcarries -an arm 68, which, through a lazy bar 169, is connected to the tubular component 18 of the telescopic link` 5|. At its lating shaft B1 is provided with a nger'Tl which is subject to-the iniiuence of a torsion spring 12 andWhich is rotatively shiftable against the ac,v

13 extending upward atan angle toward the frontof the machine and passing through the front side Wall of the standard |8. At'ts inner end, .the stem 113 vhas screw threads engaging 'aging-14 within the base I., and at its .outer end is provided with a .knurled head 15 by which it can beY conveniently .manipulated in making the adjustments. v.Whi1e, asfbefore noted, the feed mechanism herein shown isgenerally simlarto thatof the patent referred to, it is to be particularly noted that except for its carrier bar 6|, it is entirely enclosed within the lubrication chamber 1, said carrier ybar extending to the exterior through a clearance opening 16 in the portion 11 of the end wall 4 of the base l.

.In order to preclude .the escape r,of lubricant through the opening 16,'a, movingeseal 18 is provided to bear vfluid-tight against the face of a circular recess 19 machined into the inner side of the wall portion 11. As shown, the seal 18 comprises a plurality of washers 80 which snugly fit around the cylindric shank of the carrier bar 18|.. `TA forked leaf spring BlV secured at its lower 'endtogthe wang-portion 11 within the chamber *1 bya screw 82 presses upon the washers 88 to maintain the fluid seal.

Arranged to hoidthe work down on the top Wall lii normally and to oppose the feed dog 'B2 during feeding is a presser foot 83, see Fig. V. Asffshown, .thiszpresser foot 83 is pivotall-y. connected tolarshank'member 84.at the lcwer'endy wiierlsby` said banisguided lat. its upper end. .As

. ..65 tion. of said spring .by means of a setting stem shown, the lbushing .88 has'a knuried head 89 For' the purpose of'controlling the presser fout v83', *therev isshown a means which ncludesa shaft 93 located inthe frame arm H in parallel Vrelation.tothe dri-ve` shaft ..28 and journaled in the partitions Hand i5. From Figs. I and V it will; beobserved that. the vshaft 90 extends inte the head l2 and=is .there provided twith .an'arm IS-I, which, through-a slottedlnk?, is connected to another collar '.93 on theipresser bar .85. This collar 93-isufreeto slidev on the bar 85 and is spaced somewhat from thed lower face of the :collar'l so that said bar is lsubject only to the spring 8'6 normally. yAltoi'sion spring .94 exerting its influeneeupen the arm .9| vtends to 'rotatethef shaft 99clockwise'in Fig. .V. Secured to the -shaftwithin the central: compartment |16 of .the frame arm Il `Visan operatingiever 95 (Fig. V) which extendslaterally through/.a clearance opening in the rear side .of said arm Yfor connection to the upper end of a pendant link Arod. 96. Thisrod '9.3v passes through a guidev hole in the top wall E of the base l and .is connected at itsJlower .end touone extremity of a'moticn translating lever 491, see Figs. II and IV., which is fulcrumed medially on-a stud 98 projecting `cutwardfrom the` inwardly recessed portion 99 of thefrearside wall 3 -of the base l.. The other extremity of the lever 91 is engaged from beneath by a pad atthe topofa vertical thrust rod |00 .which may extendto .a suitable .actua-ting knee gpressvorfoot treadle, notillustrated. Thus, Vby

the means just described, the presser foot 83 can be lifted for conveniencel of. initially inserting the workbeneath it er at othertimes when desired j nECeSSaly.

In practice,y the chamber 1 within the base is kept lled with lubricatingol to the level in- Idcated atlLinFig. I so that the driving gear wheel 41 onthe lower shaft 4D normally 'dips into it. Asa Vccnseqnence,..oi1.is.carried up to ythe hook shaft 3|.

oil is thrown oiI and dispersed in the form of a mist within the hollow standard I0. Some of this dispersed oil is trapped in a recess |02 In the top of the right hand end bearing |9 (Fig. I) for the upper left shaft 20 and led through a connecting duct |03 to the surface of the shaft within said bearing, and the excess which oozes from the outer end oi said bearing returned into the standard by way of a duct shown at |04. Part of the dispersed oil moreover enters the bearing I8 to lubricate it, and some of it also finds its way into recesses |05 and |06 respectively, in the tops of thrust collars |01 and |08 at opposite sides of the gear 46 0n the fixed shaft |09 whereon said gear revolves, and, through connecting ducts IIO and I I I respectively, reaches the rotary bearing surface of said gear. Still another portion of the dispersed oil is trapped in a well ||2 integrally formed on the machine frame within' the standard I0 at a level above the lower shaft 40. Leading from the well ||2 through the top wall r6 of the base is a horizontal duct ||3 which terminates in a recess I6 in the depressed portion ||1 of the upper surface of the left hand end of the base top Wall 6. Also leading from the well ||2 is a duct |4 which carries oil down to the right hand bearing 42 for the lower shaft 40. As shown in Fig. VI, the recess ||6 is considerably enlarged in area as at ||8 for provision of an auxiliary oil distributing reservoir and is closed by a removable oil sealed cover plate ||9 which fits the depression I1 in the base wall 6 and which is held in place by screws. At the .bottom the reservoir I I8 has a plurality of wick filled holes |20, |2I, |22, |23, |24 and |25. The hole |20 discharges oil into a duct |26 (Figs. II and VI) which leads down through the end wall 4 of the base I, to the bearing 4I for the shaft 40, and extending laterally from said duct is a Wick filled tube |21 from which oil is carried onto the feed lift link 65 at the outer end of said shaft. From the hole |2| oil is released into the open end of the pivot pin 60 for the rear end of the feed dog carrier bar 6|, which pin, as clearly shown in Figs. II and VII, is hollow and the oil carried from thence, through ports |28, to the upper bearing bosses of the feed rocker 53. The hole |22 releases oil onto the telescopic link 5| to lub-ricate it and its eccentric 50, while the hole |23 releases lubricant into a port |29 in the top of the arm 52 ofthe feed rocker 53y see Figs. II and VII.v The holes |24 and |25 lie directly above the pivot ends of the lazy bar 69 and release oil to drop into ports |30 and |3| in the top of said bar. Leading down from the auxiliary reservoir I|8 respectively in the rear wall 3 of its base I and in the bearing lug 33 are ducts'l32 and |33, |34 respectively. f From Fig. VII it will be noted that the duct |312 discharges oil into the feed rocker shaft 54 which is hollow, by way of registering ports |35 and |36 respectively, in the tops of the lbearing 56 and said shaft. The ducts |33 and |34 on the other hand carry oil down into the bearings 44 and 32 respectively, for .the lower shaft 40 and Another port |31 at the bottom of the shaft 54 conducts oil to the bearing surfaces of the feed rocker 53 as is also clearly shown in Fig. VII. Another duct |38 extends down through the lug 36 from the auxiliary reservoir ||8 to the inner or cap bearing 35 for the rotary hook shaft 3| which is tubular and open at its inner end within said bearing. Oil so lreceived within the hook shaft 3| is conducted to the interior of the hook 30 which Vmay'Y be of the construction disclosed in U. S. Patent No. 2,035,984 granted to one of the present applicants on March 31, 1936. The hole shown at I 39 in Figs. III and VI serves as a vent to keep the auxiliary reservoir I|8 from becoming air bound; The rotary hook 30, as Well as the bearings for its shaft 3| and its actuating gears 31 and 38 are thus lubricated from the same source as the other mechanisms of the machine. As a. means for controlling flow of oil into the rotary hook 30 we have shown in Fig. I, a regulatable screw 34 which laterally enters the hook shaft 3| exteriorly of the base in the interval between Ithe end wall 4 of the latter and the hook 30, and which forms a partial obstruction crosswise of the duct of said shaft.

In order that the one source of lubrication may be utilized as well for the needle operating mechanism, we have provided within the frame arm I0; a tube |40 which passes through'both partitions I4 and I5 and which inclines downwardly toward the needle head I2. At its rear end Within the standardy I0, the top of the tube |40 is cut away as at |4I` to form a trap in which some'of the oil dispersed within said standard is caught. Wicks |42 and |43 at the left hand end of the tube |40 carry the trapped oil to various moving parts of the needle operating mechanism in a manner obvious from Fig. I.

VThe" excess oil dripping from the needle actuating mechanism is collected in a small sump |45 at the bottom of the head I2 for return to the main supply source of lubricant in thebase by a wick |46. As shown, the wick |46 is enclosed in a tube |41 which extends up within the head I2 and through the partition I4, then continues through the central chamber I6 of the arm II, and finally extends down through the wall of the standard I0, terminating at a level below the sump |45 in the head I2 immediately above the oil well ||2. This difference of level between the wick ends insures flow of oil rearward from the needle head I2 to the base by capillary action. The left hand bearing |1 (Fig. I) for the needle shaft 20 is lubricated by oil lentering it from a Aport |48 at the top in regisvtry with a vertical duct |49 in the partition I4,

said duct communicating through a transverse duct |50 with the tube- |40.

For convenience of checking the level of the oil in the base from time to time, there is shown in Figs. I and IV a gauge rod I5I which nts tightlyinto a hole in the work support 6. A grasp knob |52 at the top of the gauge rod |5I is conveniently accessible from the exterior within a recess |53 at the back of the standard |0.

Except as presentlyrpointed out, the sewing machine illustrated in Figs. IX-XV is generally similar to the one first described, and accordingly, in order to preclude repetitive description, allcorresponding elements of the second machine are identified by the same reference characters previously employed, with addition in each in-l stance however of the letter a for convenience of distinction. In the second embodiment of our invention, see Fig. XIII, the feed dog carrier bar Slo. is extended as at |55 to und'erreach the rotary hook 30u, and connected by a drop link |55 to an arm |51 ona rock shaft |58 which extends through the endrwall lavofthe base Ia 'into the lubricant chamber 1a, see Figs. IX and X. To the inner end of the shaft |58 is secured an upwardly extending arm |59,'which is coupled, by `means of a downwardly curved link |60 with component I6I of the telescopic link v5|a, see

Fig. .X also. Through the means just-described. lift movements are imparted to the feedidog 62a in precisely the same manner Aas set-forth inU. S. Patent 2,156,525 granted to, Norman V. Christensen etal. on May A2, 1939; 'I'he important feature tofbe .noted here, howeveL-is that part of the-feed lift means is enclosed within the lubricant chamber .1a.

Another change to be noted inthe present instance is that instead of aneccentric, a crank pin IGZ-is provided `on-:thelowershaft 40a, and moreover that said shaft does` Vnot vextend through the end wall 4a of the base la. As shown, `the crank pin |62 is fixed'ina disk |63 securedby a pair of screws; |64 to a small head |65 at the corresponding endof the shaft 40a. In assembling the machine, the shaftda. is intrcduced endwise through an opening |66V in the end wall 4a of the base or through an opening 16er in the opposite end wall 5a, said openings being just large 4enough to admit the head |65, and closed by'screw plugs |61 and |61.r respectively, andthecrank disk IGS-thereafter applied to said shaft. This construction obviates the necessity for unduly large openings which would have to berprovided inthe base? la if theV crank .disk |63 were integrally formed with the shaft 49a. rThe disk |63 dips into the oil supply L withinfthe base I a, vas shown in Fig. IX, and by itsrotation splashes oil about in the forward part of said base. This locally splashedk oil finds its way into ports at the tops of various parts of the feeding mechanism (Fig. X) to lubricate the pivots and shafts of thesaid mechanism. Some of this splash oilis, moreover, carried by wick V.tube |65 through the end wall 4a of the base la, to the parts of the feed lift means externally ofthe base as shown in Fig. X. Y

Another-difference to be noted in the form of machine illustrated in Figs. IX and X is that `no provision is made for lubrication of the rotary hook-30a which is of adry type such as featured in co-pending application 159,646 filed byCharIeS'RRubel on August 18, 1937 and now matured into Patent No. 2,246,010, dated June 11, 1941, As in the application just referred to, the bobjbn case holder of therotary hook 36a has axial play which is controlled Hoy a keeper disk l1 I. This keeper disk |-1| is supportedby an arm |12 which is swingable outward about a fulcrum |13 on the feed dog `carrier bar Bla to the position shown in dot and dash lines in Fig. X, Ato enable bobbin changes to be made. 'I'he arm .|12 is normally held in the full line position by a spring latch bolt shown at |14 in Fig. XIII.

Still another departure from the first described embodiment of our invention is that, in the present instance, the end wall 4a is formed with a removable plate section |15 with a clearance openingV |16 through which vthe feed carrier bar 6| a extends. If desired the opening |16 may be be sealed oil tight in the same manner as in Fig.

II. While in Fig. IX we have not shown any means for returning oil accumulation from the needle head |2a to the base, a tube such as shown at |40 in the rst embodiment may be installed for that purpose.

Havingk thus described our invention, we claim:

1..,A'sewing machine comprising a frame with a hollow work support containing a supply of lubricating oil, and a hollow communicating standard rising from the work support and sustaining an overreaching arm which terminates in-a hollow head; needle operating mechanism withinthe head; a shaftextending horizontally through the frame arm from which vthe needle operating mechanism derivesv its motion; com? tion, dispersing oil` within the standard; an open ended duct extending from the needle head to the top of the hollow within the standard whereby some of the oil dispersed as aforesaid is. caught and conductedv to the needle operating mechanism; and means operative by capillary action for lifting and returning the excess4 oil from the needle head to the supply within the work support including a wick which extends from the bottom of the head and terminates at a lower level but above the supply in said work support.

2. A sewing machine according to claim .1, wherein a well within the frame traps some of the dispersed oil; wherein a `duct conducts oil from the well to the bearings of the lower shaft; and wherein the wick vdischarges directly into said well. f

3. `A sewing machine according to claim 1, wherein theA arm provides front and rear bearings for the upper shaft; wherein the front bearing is lubricated by oil delivered through aport connecting with the duct by which oil is .carried to the needle operating mechanism; and wherein the rear bearing of the upper shaft-is formed at the top with a port which receives, some of the dispersed oil and conducts it to the shaft surface within said bearing.

4. A sewing machine comprisinga frame with a hollow work supporting base containing a sup" ply of lubricating oil, and a standard rising from the base and sustaining an overreaching arm; a

needle with operating mechanism therefor atthe,`

free end cf the arm; a rotary hook to cooperate withV the needle in stitch formation; ka shaft whereon .the hook is mounted extending horizontally into the interior of the base; an actuating shaft extending horizontally within the base-.to which the hook shaft is geared; -means on the lattershaft dipping intorthe oil and by itsrota tion dispersing theoil within the hollow of the standards; inclined conduit means from within the upper part of the standard trappingsorne of the dispersed oil and conducting it downwardly through the frame arm to the needle oper lating mechanism; an oil well within the frame base and lower part of the standard for trapping some of the dispersed oil; and a duct for carrying oil lfrom said well to an auxiliary reservoir in the base top wall forA distribution to the bearings of the rotary hook shaft as well as the shaft to which said hook shaft isl geared.

5. A sewing machine according to claim 4.,.

wherein the hook shaft is hollow; and wherein lubricating oil is conducted from the auxiliary reservoir to the hollow of the rotary hook shaft for conveyance to the rotary hook.

6. In a lock stitch sewing machine having a hollow base and a rotary hook, a hollow shaft passing through a bearing in a side Wall of the base to theinterior of the latter to the outer end of which shaft the rotary hook is secured; means within the top wall of the base for conducting voil into the shaft for lubrication of the hook; and a regulatable screw which enters the shafty later.- ally between the hook and the Vbase wall with its shank forming a partial obstruction `crosswise-nf the hollow of said shaft to control j'ilow of oil Ato the hook for lubrication of ithellatter.

7. In a sewing machine, a-ramewith a hollow base containing a supply of lubricant, and e standard rising from the base and sustaining an overreaching arm which terminates in a hollow head having a sump below the level of Vsaid arm; needle operating mechanism within the head; means for conducting lubricant from the supply in the base to the interior of said hollow head for lubricating said needle operating mechanism: and means disposed wholly within said arm operative by automatic siphonal action independently of the operation of the machinefto return through said arm excess lubricant released from said needle operating mechanism Withinthe head and collected in said sump to the supply iti-'fthe' base.

8. In a sewing machine, a frame with a hollow base containing asupply of lubricant, and a standard rising from the base and sustaining an overreaching arm which terminates in a hollow head; needle operating mechanism within the head; means for conducting lubricant from the supply in the base to thev needle operating mechanism; and means operative by combined capillary and siphonal action for returning excess lubricant released from the needle operating mechanism in the head to the supply in the base, including a tube with a wick therein which extends from the bottom of said head and terminates at a lower level within the standard above said oil supply.

9. In a sewing machine, a frame with a hollow base containing a supply of lubricant, and a hollow communicating standard rising from the base and sustaining a hollow overreaching arm which terminates in a hollow head; needle operating mechanisml within the head; means for conducting lubricant from the supply in the base to the needle operating mechanism; and means operative by combined capillary and siphonal action for returning excess lubricant released from the needle operating mechanism in the head to the supply in the base, including a tube with a wick therein Which'extends from the bottom of the head horizontally through the overhanging arm, and which terminates at a lower level within the standard above the lubricant supply.

10. In a sewing machine, a frame with a hollow base containing a supply of lubricant, and a hollow communicating standard rising from the base and sustaining an overreaching arm which terminates in a hollow head having a sump below the level of said arm; needle operating mechanism within the head; means for conducting lubricant from the supply in the base to the needle operating mechanism including a substantially horizontal open-ended duct which extend-s from within the needle head to the top of the hollow of the standard, and means within the standard for elevating lubricant from the supply within the base to the receiving end of the duct; and means includlng a tube with a wick therein extending through said arm operative by combined capillary and siphonal action for returning excess lubricant released from the needle operating mechanism in the head and collected in said sump to the supply in the base.

11. In a sewing machine, a frame with a hollow base containing a supply of lubricant and a standard rising from the base and sustaining an overhanging arm which terminates in a hollow head having a sump below the level of said head for lubricating said needle operatingmechfanism; and kconstantly operative meansA disposed wholly within said arin'for collectin'gtand'conducting through said arm excess lubricant re'- leased from the needle operating mechanism within the head t0 said cooperating mechanism to lubricate' theiatt'ef and thence to said supply in thebase. 'L

12. In a sewing machine,the combinationof a lfratrie with a hollow base `containing a supply of lubricant, anda standard rising from the base and ysustaining an overreaching'ar'm which terminates head for lubricating said needle operating mechanism; a sump in the needle head below the level of said arm for collecting excess voil released from the needle operating mechanism; feed actuating mechanism within the hollow of the base beneath said over-reaching arm; and 'constantly operative means for elevating lubricant from the sump in the needle head and conducting the same through said arm directly to the feed actuating mechanism to lubricate the latter.

13. In a sewing machine, a combination of a frame with a hollow base containing a supplyof lubricant, and a standard rising from the base and sustaining an overreaching arm which terminates in a hollow head; needle operating mechanism Within the head; means. for delivering lubricant by combined splash action and gravity from the supply in the base to the interior of said hollow head for lubricating said needle operating mechanism; a sump in the needle head below the level of said arm for collecting excess oil released from the needle operating mechanism; feed actuating mechanism within the hollow of the base; and constantly operative means including a self-starting siphon for conducting lubricant from the sump in the needle head through said arm to said feed actuating mechanism to lubricate the latter.

14. In a sewing machine, the combination of a frame with a hollow base containing a supply of lubricant, and a standard rising from the base and sustaining an overreaching arm which terminates in a hollow head; needle operating mechanism Within the head including a reciprocable member carrying a needle; constantly operative means for delivering lubricant withdrawnffrom the supply in the base to the interior of said hollow head for lubricating said needle operating mechanism; a sump inf the needle head below the level of said arm; a, rotary hook cooperating with the needle beneath the work support and having a bearing surface between its rotating and nonrotating components; and means effective independently of the operation of the machine for` elevating the lubricant from the sump in the ansm withinv the head including a reciprdcale member carryinga needle; constantly operative means for Vdelivering lubricant Withdrawn from the supply in the base to the'interior ofsaid hcllow head for lubricating said Vneedleactuating mechanism; a sump in the'nee'dle head belowthe level of said arm; a rotaryhook cooperating with the needle beneath the Work support and having a bearing surface between its rotating and nonrotating components; means for conducting lubricant from the sump in the needle head'through saidarm to the'bearing surface ofthe hook; and means adjacent to and accessible exteriorly of said hook for controlling the amount oflubricant flowing to` said`bearingsurface,` the construction and arrangement Ybeingssuch that exesszlubricant withdrawn fromt the sump is returned to saidsupplyinthebase. L j ai 1'6; In a sewing machine. aframe' with a hol- V10W base containing. a supply "or lubricant and `aV standardfrisingy from the Y base and sustaining 'operating mechanism; Y 'andv constantly operable means for'elevati'ng lubricant from the sump in the Vhead land'- deliverlng*it through said arrntc said cooperating mechanism withn the vbasel to lubricateit. Y- i Y i Y Y QEORGESAUER. i

, ALBERTA/f.. SCHWEDA. l eLARENc,-1izo. sMrrH.. 

